The Red Sox are looking to improve their bullpen and have interest in Pittsburgh's Joel Hanrahan.

Hanrahan appears to be Boston's top target, and according to a report, they have engaged in talks with the Pirates about the reliever.

The Pirates are looking for a starting pitcher, and the Red Sox could possibly give up Franklin Morales or Alfredo Aceves. Pittsburgh may be thinking more along the lines of Felix Doubront, which would be a deal-breaker, according to the major league source.